package com.cloudcross.ssp.common.utils;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.math.BigDecimal;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;

import javax.servlet.http.HttpServletRequest;

import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

public class Common {
    //后台访问
    public static final String BACKGROUND_PATH = "security";
    //前台访问
    public static final String WEB_PATH        = "/WEB-INF/jsp/web";
    //默认除法运算精度
    private static final int   DEF_DIV_SCALE   = 10;

    /**
     * String转换double
     * 
     * @param string
     * @return double
     */
    public static double convertSourData(String dataStr) throws Exception {
        if (dataStr != null && !"".equals(dataStr)) {
            return Double.valueOf(dataStr);
        }
        throw new NumberFormatException("convert error!");
    }

    /**
     * 判断变量是否为空
     * 
     * @param s
     * @return
     */
    public static boolean isEmpty(String s) {
        return null == s || "".equals(s) || "".equals(s.trim()) || "null".equalsIgnoreCase(s);
    }

    /**
     * 使用率计算
     * 
     * @return
     */
    public static String fromUsage(long free, long total) {
        Double d = new BigDecimal(free * 100 / total).setScale(1, BigDecimal.ROUND_HALF_UP).doubleValue();
        return String.valueOf(d);
    }

    /**
     * 返回当前时间　格式：yyyy-MM-dd hh:mm:ss
     * 
     * @return String
     */
    public static String fromDateH() {
        DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        return format1.format(new Date());
    }

    /**
     * 返回当前时间　格式：yyyy-MM-dd
     * 
     * @return String
     */
    public static String fromDateY() {
        DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");
        return format1.format(new Date());
    }

    /**
     * 用来去掉List中空值和相同项的。
     * 
     * @param list
     * @return
     */
    public static List<String> removeSameItem(List<String> list) {
        List<String> difList = new ArrayList<String>();
        for (String t : list) {
            if (t != null && !difList.contains(t)) {
                difList.add(t);
            }
        }
        return difList;
    }

    /**
     * 返回用户的IP地址
     * 
     * @param request
     * @return
     */
    public static String toIpAddr(HttpServletRequest request) {
        String ip = request.getHeader("X-Forwarded-For");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }

    /**
     * 传入原图名称，，获得一个以时间格式的新名称
     * 
     * @param fileName 　原图名称
     * @return
     */
    public static String generateFileName(String fileName) {
        DateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");
        String formatDate = format.format(new Date());
        int random = new Random().nextInt(10000);
        int position = fileName.lastIndexOf(".");
        String extension = fileName.substring(position);
        return formatDate + random + extension;
    }

    /**
     * 取得html网页内容 UTF8编码
     * 
     * @param urlStr 网络地址
     * @return String
     */
    public static String getInputHtmlUTF8(String urlStr) {
        URL url = null;
        try {
            url = new URL(urlStr);
            HttpURLConnection httpsURLConnection = (HttpURLConnection) url.openConnection();

            httpsURLConnection.setRequestMethod("GET");
            httpsURLConnection.setConnectTimeout(5 * 1000);
            httpsURLConnection.connect();
            if (httpsURLConnection.getResponseCode() == 200) {
                // 通过输入流获取网络图片
                InputStream inputStream = httpsURLConnection.getInputStream();
                String data = readHtml(inputStream, "UTF-8");
                inputStream.close();
                return data;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

        return null;

    }

    /**
     * 取得html网页内容 GBK编码
     * 
     * @param urlStr 网络地址
     * @return String
     */
    public static String getInputHtmlGBK(String urlStr) {
        URL url = null;
        try {
            url = new URL(urlStr);
            HttpURLConnection httpsURLConnection = (HttpURLConnection) url.openConnection();

            httpsURLConnection.setRequestMethod("GET");
            httpsURLConnection.setConnectTimeout(5 * 1000);
            httpsURLConnection.connect();
            if (httpsURLConnection.getResponseCode() == 200) {
                // 通过输入流获取网络图片
                InputStream inputStream = httpsURLConnection.getInputStream();
                String data = readHtml(inputStream, "GBK");
                inputStream.close();
                return data;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

        return null;

    }

    /**
     * @param inputStream
     * @param uncode 编码 GBK 或 UTF-8
     * @return
     * @throws Exception
     */
    public static String readHtml(InputStream inputStream, String uncode) throws Exception {
        InputStreamReader input = new InputStreamReader(inputStream, uncode);
        BufferedReader bufReader = new BufferedReader(input);
        String line = "";
        StringBuilder contentBuf = new StringBuilder();
        while ((line = bufReader.readLine()) != null) {
            contentBuf.append(line);
        }
        return contentBuf.toString();
    }

    /**
     * @return 返回资源的二进制数据 @
     */
    public static byte[] readInputStream(InputStream inputStream) {

        // 定义一个输出流向内存输出数据
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        // 定义一个缓冲区
        byte[] buffer = new byte[1024];
        // 读取数据长度
        int len = 0;
        // 当取得完数据后会返回一个-1
        try {
            while ((len = inputStream.read(buffer)) != -1) {
                // 把缓冲区的数据 写到输出流里面
                byteArrayOutputStream.write(buffer, 0, len);
            }
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        } finally {
            try {
                byteArrayOutputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
                return null;
            }
        }

        // 得到数据后返回
        return byteArrayOutputStream.toByteArray();

    }

    /**
     * 修改配置　
     * 
     * @param request
     * @param nodeId
     * @return
     * @throws Exception
     */
    @ResponseBody
    @RequestMapping("/modifySer")
    public static Map<String, Object> modifySer(String key, String value) throws Exception {
        Map<String, Object> dataMap = new HashMap<String, Object>();
        try {
            PropertiesUtils.modifyProperties(key, value);
        } catch (Exception e) {
            dataMap.put("flag", false);
        }
        dataMap.put("flag", true);
        return dataMap;
    }

    /**
     * 获取当前认证通过的用户名
     * 
     * @return
     */
    public static String findAuthenticatedUsername() {
        String username = null;
        Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        if (principal instanceof UserDetails) {
            username = ((UserDetails) principal).getUsername();
        } else {
            username = principal.toString();
        }
        return username;
    }

    /**
     * 获取登录账号的ID
     * 
     * @author wuqiang.du Email：mmm333zzz520@163.com date：2014-2-27
     * @param request
     * @return
     */
    public static String findUserSessionId(HttpServletRequest request) {
        return request.getSession().getAttribute("userSessionId").toString();
    }

    /**
     * 获取登录账号的的对象
     * 
     * @author wuqiang.du Email：mmm333zzz520@163.com date：2014-2-27
     * @param request
     * @return Object 返回是Object..需要转型为(Account)Object
     */
    public static Object findUserSession(HttpServletRequest request) {
        return request.getSession().getAttribute("userSession");
    }

    /**
     * 提供精确的减法运算。
     * 
     * @param v1 被减数
     * @param v2 减数
     * @return 两个参数的差
     */
    public static double sub(double v1, double v2) {
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.subtract(b2).doubleValue();
    }

    /**
     * 提供精确的加法运算。
     * 
     * @param v1 被加数
     * @param v2 加数
     * @return 两个参数的和
     */
    public static double add(double v1, double v2) {
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.add(b2).doubleValue();
    }

    /**
     * 提供精确的乘法运算。
     * 
     * @param v1 被乘数
     * @param v2 乘数
     * @return 两个参数的积
     */
    public static double mul(double v1, double v2) {
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.multiply(b2).doubleValue();
    }

    /**
     * 提供（相对）精确的除法运算，当发生除不尽的情况时，精确到 小数点以后10位，以后的数字四舍五入。
     * 
     * @param v1 被除数
     * @param v2 除数
     * @return 两个参数的商
     */
    public static double div(double v1, double v2) {
        return div(v1, v2, DEF_DIV_SCALE);
    }

    /**
     * 提供（相对）精确的除法运算。当发生除不尽的情况时，由scale参数指 定精度，以后的数字四舍五入。
     * 
     * @param v1 被除数
     * @param v2 除数
     * @param scale 表示表示需要精确到小数点以后几位。
     * @return 两个参数的商
     */
    public static double div(double v1, double v2, int scale) {
        if (scale < 0) {
            throw new IllegalArgumentException("The scale must be a positive integer or zero");
        }
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.divide(b2, scale, BigDecimal.ROUND_HALF_UP).doubleValue();
    }

}
